10-12-2011
Thanks a ton.
I thought myself to be good with regular expressions, probably time to change it
Let's assume below stands true:
Quote:
The behavior of multiple adjacent duplication symbols ( '+', '*', '?', and intervals) produces undefined results.
echo a/b/c+ | awk -F'/b/c+' '{print $1, $2}'
a +
Quote:
c+ matches one or more occurrences of 'c'. + comes as second field
echo a/b/c | awk -F'/b/c+' '{print $1, $2}'
a
Quote:
We don't have a second field here
Request your thoughts on why the below doesn't match when we have a $:
echo a/b/c+ | awk -F'/b/c+$' '{print $1, $2}'
a/b/c+
Quote:
Here is my reasoning, please correct
c+ matches a/b/c.
$ makes it to think that it's the end of line, but it isn't as we have an additional + after that.
Hence, it doesn't qualify for a match & fails.
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LEARN ABOUT DEBIAN
cgi::application::dispatch::regexp
CGI::Application::Dispatch::Regexp(3pm) User Contributed Perl Documentation CGI::Application::Dispatch::Regexp(3pm)
NAME
CGI::Application::Dispatch::Regexp - Dispatch requests to CGI::Application based objects using regular expressions
SYNOPSIS
use CGI::Application::Dispatch::Regexp;
CGI::Application::Dispatch::Regexp->dispatch(
prefix => 'MyApp',
table => [
'' => { app => 'Welcome', rm => 'start' },
qr|/([^/]+)/?| => { names => ['app'] },
qr|/([^/]+)/([^/]+)/?| => { names => [qw(app rm)] },
qr|/([^/]+)/([^/]+)/page(d+).html?| => { names => [qw(app rm page)] },
],
);
DESCRIPTION
CGI::Application::Dispatch uses its own syntax dispatch table. "CGI::Application::Dispatch::Regexp" allows one to use flexible and
powerful Perl regular expressions to transform a path into argument list.
DISPATCH TABLE
The dispatch table should contain list of regular expressions with hashref of corresponding parameters. Hash element 'names' is a list of
names of regular expression groups. The default table looks like this:
table => [
qr|/([^/]+)/?| => { names => ['app'] },
qr|/([^/]+)/([^/]+)/?| => { names => [qw(app rm)] },
],
Here's an example of defining a custom 'page' parameter:
qr|/([^/]+)/([^/]+)/page(d+).html/?| => { names => [qw(app rm page)] },
COPYRIGHT & LICENSE
Copyright Michael Peters and Mark Stosberg 2008, all rights reserved.
SEE ALSO
CGI::Application, CGI::Application::Dispatch
perl v5.14.2 2011-11-26 CGI::Application::Dispatch::Regexp(3pm)